Winoh with friction clutch



May 2, 1950 R. F. SYMONDS 2,506,397

WINCH WITH FRICTION CLUTCH Filed June 19, 1945 2 Sheets-Sheet 1 INVENTOR fg% Z Wands.

AT RNEY 2 Sheets-Sheet 2 MN \w W."

R. F. sYMoNDs WINCH WITH FRICTION CLUTCH Filed June 19, 1945 May 2, 1950' INVENTOR BY fwlaf Patented May 2, 1950 Engl nd aco n ii lhpnsistsm tel-instru hich neduc he e t e; mannf.. P r. ma nfi n nce iz w n hche pf t tvpe dise os dnlmyprior-Ea e 0115 5.0 9 la ee wu ci manv aears ani e ee ve iehdeer a f satisfactcrw e v ermvarious w an facilitate he t ia n the- .ciutch-:w ch. -i interposedib tween h 'cl vn' purp se t ch must be-lahaely disassembled+ necessitatingm cna; tedious. operation wh h? cann t carried amt conveniently nishipb ard -i'lhelpt sentinventicn camnrises'a new.amide-1*?v proved winch cons llctifim whereby -theeremoval f alimited nrzmbeepfgrelatively small parts percess to the cIutcHcQne -Which"is to be relined. y t i l ens rl ti n .nqt en yi dbeqmanw factureof the clutch simplifi d, gatp ime ii- 1 'Thesa and vothen advantages incident -to;-- n1-y novel construction .will be -best understood --and appreciated frpm the followingr description of a preferred embodiment of the invention, selected for purposes of illustration and shown in the accompanying drawings an which Fig. 1 is a view of one half of the winch in longitudinal section showing the clutch engaged.

Fig. 2 is a similar view showing the clutch cones separated for relining, and

Fig. 3 is a fragmentary plan view of the remov able cap plate and adjacent parts.

The enclosing frame of the winch includes flanged end walls l0, one of which is shown in the drawings, and a central flanged member I l in which are supported bearings for the main horizontal shaft I2 of the winch. The outboard bearing for the shaft l2 includes a heavy collar or sleeve I3 which normally rests in a semi-circular recess in the end member [0 of the frame. The sleeve I3 is shouldered and provided with an inwardly extending tubular stem [4 of reduced diameter. The sleeve itself is internally recessed in its large diameter outer end to clear the shaft l2 and to provide a chamber for ball bearings l5 by which the shaft is carried within the sleeve.

heft-pan the drum: =Hi't'herto.-:-in o der- 3130 reach the:interioriofitherdlutch; forrganymits separation of the clutch members and. ac- 29' I as the case may be.

tw Ii'aninternals alder provided in thesleeve 1-; d aremovablehanged-hoverplate lfiewhih as shown in Fig; l is wholted to the-.oute1'-:-end of th Sleeve I 3; Thashaftis -shouldered to receive the innergrace pf ,the .ball bearings; 15 and 1s threaded to take? a h ir of, lock nuts .I l which rotate-.with the shaft in the .charnbemformed Joy the flange.of thecovenplate l6.

, Theasnpporting sleeved 3.,is removably held-.-in place iii-the frame byascap plate 1.8 presenting a .semicirculara'ecess fitting nponthe outer-large diameternportionf-pf. theasleeve .I3 andhavinglaterally: extending poprtionsewhich are secured by yertical. bolts late the endmember 10 0f the frame. The-cap plate id is als extendedi--inwardly t ea 'n-gszllrfo artransverseworm shaft 3i} w-hieh- 1s located above the inner small diameter stems liof the bearingsleeve." The worm shaft -.car-ri.es at lite-router. end-a. hand-. wheel and constitutes a-partof-themechanism-for shifting the loefsesmen ber pt theeclutcheinto and out of. en agement. -The outer; end t -the main shaft this apered to re eeiyeethehub-of a'small hoisting hee 1 .s-l herl t ?."hein& li it do th h t an held in place, by; an end-plate and a; bolt :34.

ozthe shaft i2; is Whlchxqe s itut sith Fl sh-me r Of, the clutch andwce s :admirab raci 241 leather o Qth csia The drum ,ofthew nch e-loc. .mem fit clut and maneeiz' rarhubi; ,andaninner flan theflangeifiis anannular plate '28 heglderedit iteceiueztheinner:fian d nd fl a sleeve 29. Between the innenendofrthe flanged sleeve 29 and the shaft iii are interposed ball bearlugs 39. Upon the outer end of the sleeve 29 are formed worm teeth 3i which have an external diameter slightly less than that of the sleeve I 3 and mesh with a worm on the inner end of the worm shaft 2|. There is a threaded connection between the stationary tubular stem M of the collar l3 and the sleeve '29 and accordingly when this sleeve is rotated by turning the worm shaft 2! the whole drum is shifted longitudinally upon the shaft l2 and the clutch engaged or disengaged A friction brake band 32 surrounds the circumference of the flange 21 of the drum and this may be operated when the clutch is disengaged to arrest rotation of the drum and to hold it stationary against the pull of the cable passing about it.

The winch is herein shown as partially encased idly secured ,the cone 2,3

3 within a housing 33. If it becomes necessary to reline the clutch 2321, the worn shaft 2! is first turned to move the sleeve 29 endwise toward the right, as seen in Fig. 2, to carry the sleeve outwardly to the limit of its travel. The head 22 is then removed from the end of the shaft. The cover plate 16 and the lock nuts 11 are removed and the cap plate I8 is also unbolted and removed together with the worm shaft 2|. Now the sleeve l3 may be pulled outwardly toward the right and, by reason of its threaded connection with the sleeve 29, that sleeve and the entire drum will be displaced toward the right. The sleeve 13 is cylindrical and of uniform diameter so that it is free for outward movement in the frame when released by the removal of the cap plate H8. The stem [4 and the sleeve 29 constitute a tubular connection between the removable bearing sleeve l3 and the drum carrying the loose member 21 of the clutch. The threaded stem I 4 is substantially reduced in diameter as compared to the external diameter of the sleeve 13, and the external diameter of the worm teeth 3| on the connecting sleeve 2Q is slightly less than that of the outside diameter of the bearing sleeve l3, thus perm tting these elements to pass freely into or through the recess in the end member I0 of the frame when released by removal of the cap plate l8. The cone member 2% of the clutch is thus left entirely free of the annular member 21 and remains in unobstructed position wherein the lining 24 may be conveniently removed and replaced with a fresh lining. Subsequently the small parts, removed for this operation, may be replaced and the winch restored to operat ve position with its relined clutch.

Having thus disclosed my invention, I claim as new and desire to secure by Letters Patent:

1. A winch including in its structure a stationary frame having an end member provided with a recess, bearing sleeve mounted in the recess of said member and hav ng an inwardly projecting tubular stem, a driving shaft rotatable in said sleeve, a clutch mounted at an intermediate point on said shaft and having longitudinally separable members, tubular connections interposed between the stem of said bearing sleeve and the loose member of the clutch, a cap plate for removably securing the bearing sleeve in place in the end member of the frame, ball bearings for the shaft encased within the bearing sleeve and means for removably retaining the ball bearings in place, the bearing sleeve being outwardly movable when released and acting through said tubular connections to displace longitudinally the loose member of the clutch for the purpose of exposing the interior of the clutch.

2. A winch including in its structure a frame, a horizontal shaft therein, a friction clutch located at an intermediate point on the shaft and having a clutch member movable longitudinally on the shaft, a bearing sleeve for the shaft seated in the frame and having an outer large diameter portion and an inwardly extending threaded stem of substantially reduced diameter, a rotatable internally threaded sleeve connected to the stem and to the clutch member and having at one end external worm teeth of less outside diameter than the outer large diameter portion of the bearing sleeve in the frame, and a cap plate holding the bearing sleeve in place in the frame, the internally threaded sleeve being movable endwise into the space vacated by the bearing sleeve when the cap plate and sleeve are removed.

3. A winch including in its structure a frame of rectangular contour having an outer end wall with a semi-circular recess therein, a longitudinally disposed shaft within the frame, a friction clutch located at an intermediate point on the shaft within the frame and having a clutch member movable on the shaft, an outboard bearingsleeve for the shaft comprising a sleeve having an outer cylindrical portion seated in the recess of the end wall and an inwardly extending threaded stem of substantially less diameter than its said cylindrical portion, a rotatable internally threaded sleeve connected to said stem and to the clutch member and having external worm teeth of less overall diameter than the outer cylindrical portion of the bearing sleeve, and a detachable cap plate holding the bearing sleeve in place in the end wall of the frame, the internally threaded sleeve being movable endwise through the space vacated by the bearing sleeve when the cap plate and sleeve are removed.

RALPH F. SYMONDS.

REFERENCES CITED The following references are of record inthe file of this patent:

UNITED STATES PATENTS Number Name Date 1,473,248 Norris Nov. 6, 1923 1,601,742 Rosendahl Oct. 5, 1926 1,609,421 Norris Dec. '7, 1926 1,746,060 Symonds Feb. 4, 1930 2,263,064 Allin Nov. 18, 1941 FOREIGN PATENTS Number Country Date 262,721 Great Britain May 5, 1927 

